Fix compile errors when building with enable_vulkan=true.

content/browser/compositor/vulkan_browser_compositor_output_surface.h

 // Copyright (c) 2016 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef CONTENT_BROWSER_COMPOSITOR_VULKAN_BROWSER_COMPOSITOR_OUTPUT_SURFACE_H_
 #define CONTENT_BROWSER_COMPOSITOR_VULKAN_BROWSER_COMPOSITOR_OUTPUT_SURFACE_H_
 
 #include <memory>
 
 #include "base/macros.h"
@@ skipping 24 matching lines @@
   void BindToClient(cc::OutputSurfaceClient* client) override;
   void EnsureBackbuffer() override;
   void DiscardBackbuffer() override;
   void BindFramebuffer() override;
   bool IsDisplayedAsOverlayPlane() const override;
   unsigned GetOverlayTextureId() const override;
   bool SurfaceIsSuspendForRecycle() const override;
   void Reshape(const gfx::Size& size,
                float device_scale_factor,
                const gfx::ColorSpace& color_space,
-               bool has_alpha) override;
+               bool has_alpha,
+               bool use_stencil) override;
   uint32_t GetFramebufferCopyTextureFormat() override;
   void SwapBuffers(cc::OutputSurfaceFrame frame) override;
 
  private:
   void SwapBuffersAck();
 
   std::unique_ptr<gpu::VulkanSurface> surface_;
   cc::OutputSurfaceClient* client_ = nullptr;
   base::WeakPtrFactory<VulkanBrowserCompositorOutputSurface> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(VulkanBrowserCompositorOutputSurface);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_COMPOSITOR_VULKAN_BROWSER_COMPOSITOR_OUTPUT_SURFACE_H_